STRANGE MAILBOX PROBLEM

From: Naboth Semwayo <naboths@xxxxxxxxxxxxxxxx>

To: "'exchangelist@xxxxxxxxxxxxx'" <exchangelist@xxxxxxxxxxxxx>

Date: Tue, 24 Feb 2004 08:35:21 +0200

I have a user (USER A)who cant receive email form one other particular user
(USER B). The user can receive mail from everbody else except this one user.
I have deleted the mailbox for USER B and recreated. This worked for a few
weeks and now happening again. I am on MX 5.5 and OUTLOOK 2000. What could
be wrong here